بسم هللا الرحمن الرحيم
IN THE NAME OF ALLAH THE MOST
GRACIOUS THE MOST MERCIFUL
HUMAN DENTITION
DENTAL ANATOMY
Prof. Abdelhamied Y. M. Saad, BDS, MS (Egypt), Ph.D. (U.S.A.)
INTRODUCTION
Dental Anatomy Includes:
1- The Surface Form Of The Oral Cavity.
2- The External Morphology And Internal
Composition Of The Individual Teeth.
3- The Relationship Of The Teeth To Each
Other And To The Skull Bone.
1- THELIPSURFACE FORM GINGIVA
OF THE
ORAL CAVITY.
NOTE: TAP CLICK
TEETH
PALATE
ROOF
OF THE
MOUTH CHEEK
FLOOR
OF THE
TONGUE
MOUTH
PALATINE
UVULA TONSILS
LABIAL
GINGIVA
FRENUM
1- THE SURFACE FORM OF THE
ORAL CAVITY.
Upon looking to the oral cavity you can see:
1-Lips
2-Teeth
3-Gingiva
4-Cheek
5-Tongue
6-Floor of the mouth
7-Roof of the mouth
1- Lips
-There Are Two Lips Upper Lip
And Lower Lip.
-The Corner Of The Mouth
Where They Meet Is Called
Commissure.
-Two Grooves Are Distinguished
Around Lips.
Nasolabial groove which run diagonally
downward on each side of the nostril
toward the corner of the lip,
and labiomental groove which run
horizontally under the lower lip and
emphasize the chin.
2- Teeth
-Teeth Are Arranged In The Oral
Cavity In Two Arches Called The Dental
Arches One Lower And One Upper.
-The Upper Arch Is Called The Maxilla
The Teeth In This Arch Are Called Upper Or
Maxillary Teeth.
-The Lower Arch Is Called The Mandible The
Teeth In This Arch Are Called Lower Or
Mandibular Teeth.
-Each Dental Arch Has A Midline
That Divides The Arch Into Two Approximately
Equal Right And Left Segments Named As
Quadrant.
-There Are Four Quadrants In The Entire
Oral Cavity.
In The Oral Cavity There Are Four
2 1
Classes Of Teeth That Includes:
1-Incisors: 3
- There is two incisors: The central
incisor and The lateral incisor. 4
2-Canines:
-There is one canine in each quadrant.
3-Premolars:
-There are two in each quadrant. First
and Second premolars.
4-Molars:
-There are three in each quadrant.
They are the First molar, the
Second molar and the Third molar.
-The incisors and canines are
considered Anterior teeth since
they are closer to the midline.
- Molars and premolars are
considered Posterior teeth since
they are farther from the midline.
Maxilla & Mandible
Nasolabial groove
Upper lip Upper lip
Lower lip Commissure
Lower lip
.
Labiomental groove
FRONT VIEW LATERAL VIEW
LOWER
UPPER
OR
OR
MAXILLARY MANDIBULAR
TEETH TEETH
UPPER DENTAL ARCH. LOWER DENTAL ARCH
(MAXILLARY TEETH) (MANDIBULAR TEETH)
3- Gingiva
- It is that part of the
masticatory tissue that
surrounds the
cervical part of teeth.
- It is firmly attached
to the teeth and their
surrounding bone.
4- Cheeks
- The lining of the inside of
the cheeks is shiny with a
white line called linea alba
buccalis running posteriorly
Upper Teeth
on each side at the level
where the upper and lower
teeth come together. Lower Teeth
- The parotid papilla : It is a
round elevation of tissue
between first and second
molars at a just above the
occlusal plane. This papilla
cover the duct openings
(Stensen’s ducts) on either
side of the parotid glands.
5- Tongue
- The tongue is a broad flat organ
composed of muscles and
glands.
- It rests in the floor of the mouth.
- It is the principle organ of taste
and is most important in speech
and invaluable during mastication
and deglutition (swallowing).
- The dorsum (topside) of
the tongue is grayish red and is
rough. It is covered by different
kinds of papillae.
-The smoother posterior third of
the dorsum contains numerous
mucous glands and lymph follicle
referred to as the lingual tonsil.
- The ventral (undersurface) of the
tongue is shiny and blood vessels
are visible beneath the fine
mucous membrane.
6- Floor of the mouth
- It is shiny and
some large blood vessels
may be seen near the TONGUE
surface.
- Beneath the tongue there
are two bilateral bulges
caused by the presence of
large salivary glands.
- A valley shaped space
between tongue and teeth
is named as alveolingual
sulcus.
VENTRAL SURFACE OF THE TONGUE
AND THE FLOOR OF THE MOUTH
7- Roof of the mouth
- Its anterior part is named
as hard palate.
- Its posterior part is named
as soft palate which ends by
HARD PALATE
a small fleshy structure named
uvula hanging from its center.
-The junction between hard HARD PALATE
and soft palate is called vibrating line
vibrating line SOFT PALATE
- The soft palate is
sometimes redder than the
hard palate.
UVULA
- The end of the
hard palate is
opposite the third
molars where the
soft palate begins.
- There is fat or
salivary gland HARD PALATE
tissue beneath the
surface tissue of the
hard palate.
SOFT PALATE
MORE ABOUT THE ROOF OF
THE MOUTH.
Uvula
CORONAL SECTION OF THE PALATE
MORE
LIP
ABOUT THE SURFACE
GINGIVA
FORM OF THE ORAL CAVITY.
NOTE: TAP CLICK
TEETH
PALATE
ROOF
OF THE
MOUTH CHEEK
FLOOR
OF THE
TONGUE
MOUTH
PALATINE
UVULA TONSILS
LABIAL GINGIVA
FRENUM
MORE ABOUT THE SURFACE FORM
OF THE ORAL CAVITY.
A- UVULA
B- TONGUE
C- PALATE
D- SALIVARY GLANDS
E- CHEEK
F- PALATINE TONSILES
THANk YOU
Niagra Falls
ANY QUESTION ?
Niagra Falls
